This is awesome and disturbing detailed article about one of the great mysteries of human behavior.

By JENNIFER KAHN
Published: May 11, 2012

For the past 10 years, Waschbusch has been studying “callous-unemotional” children — those who exhibit a distinctive lack of affect, remorse or empathy — and who are considered at risk of becoming psychopaths as adults. To evaluate Michael, Waschbusch used a combination of psychological exams and teacher- and family-rating scales, including the Inventory of Callous-Unemotional Traits, the Child Psychopathy Scale and a modified version of the Antisocial Process Screening Device — all tools designed to measure the cold, predatory conduct most closely associated with adult psychopathy. (The terms “sociopath” and “psychopath” are essentially identical.) A research assistant interviewed Michael’s parents and teachers about his behavior at home and in school. When all the exams and reports were tabulated, Michael was almost two standard deviations outside the normal range for callous-unemotional behavior, which placed him on the severe end of the spectrum.

In some children, C.U. traits manifest in obvious ways. Paul Frick, a psychologist at the University of New Orleans who has studied risk factors for psychopathy in children for two decades, described one boy who used a knife to cut off the tail of the family cat bit by bit, over a period of weeks. The boy was proud of the serial amputations, which his parents initially failed to notice. “When we talked about it, he was very straightforward,” Frick recalls. “He said: ‘I want to be a scientist, and I was experimenting. I wanted to see how the cat would react.’ ”

In another famous case, a 9-year-old boy named Jeffrey Bailey pushed a toddler into the deep end of a motel swimming pool in Florida. As the boy struggled and sank to the bottom, Bailey pulled up a chair to watch. Questioned by the police afterward, Bailey explained that he was curious to see someone drown. When he was taken into custody, he seemed untroubled by the prospect of jail but was pleased to be the center of attention.

In many children, though, the signs are subtler. Callous-unemotional children tend to be highly manipulative, Frick notes. They also lie frequently — not just to avoid punishment, as all children will, but for any reason, or none. “Most kids, if you catch them stealing a cookie from the jar before dinner, they’ll look guilty,” Frick says. “They want the cookie, but they also feel bad. Even kids with severe A.D.H.D.: they may have poor impulse control, but they still feel bad when they realize that their mom is mad at them.” Callous-unemotional children are unrepentant. “They don’t care if someone is mad at them,” Frick says. “They don’t care if they hurt someone’s feelings.” Like adult psychopaths, they can seem to lack humanity. “If they can get what they want without being cruel, that’s often easier,” Frick observes. “But at the end of the day, they’ll do whatever works best.”

If defeated, Lugar, the senior Republican on the Senate Foreign Relations Committee and a leading voice on stemming the spread of nuclear weapons, would be the first Senate incumbent to lose his seat this election year.

The poll conducted this week showed Mourdock with 48 percent support among likely Republican primary voters compared to Lugar's 38 percent. This was a sharp swing from a poll taken in late March by the same group in which Lugar led 42 percent to 35 percent.